Ead the passage.

[1] Mixed breed dogs are the best because they are better than other dogs. [2] I have three dogs at home: a boxer, a Chihuahua, and a mixed-breed dog we adopted from the shelter. [3] I have learned a lot about dogs by owning them for many years. [4] My friend says that she also knows a lot about dogs. [5] However, she does not own any dogs, so she cannot claim that she knows anything about dogs.

What type of logical fallacy is sentence 4?
false dilemma
topic avoidance
ad hominem attack
begging the question